FUNZIP(1)
USER COMMANDS
FUNZIP(1)
NAME
funzip - extract from a ZIP archive file as a filter
SYNOPSIS
[...]
|
funzip [ -password ]
funzip [ -password ]
|
[...]
input.zip |
[...]
ARGUMENTS
[-password]
Optional password to be used if ZIP archive
is
encrypted.
Decryption may not be supported at some
sites. See DESCRIPTION for more details.
DESCRIPTION
funzip acts as a filter; that is, it assumes that a ZIP
archive is being piped into standard input, and it extracts
the first member from the archive to stdout. If there is an
argument, then the input comes from the specified file
instead of from stdin. A password for encrypted zip files
can be specified on the command line (preceding the file
name, if any) by prefixing the password with a dash. If the
first entry of the zip file is encrypted and no password is
specified on the command line, then the user is prompted for
a password, and the password is not echoed on the console.
Given the limitation on single-member extraction, funzip is
most useful in conjunction with a secondary archiver program
such as tar(1). The following section includes an example
illustrating this usage in the case of disk backups to tape.
EXAMPLES
To use funzip to extract the first member
archive test.zip and to pipe it into more(1):
file
of
the
funzip test.zip | more
To use funzip to test the first member file of test.zip (any
errors will be reported on standard error):
funzip test.zip > /dev/null
To use zip and funzip in place of
for tape backups:
compress(1)
and
tar cf - . | zip -7 | dd of=/dev/nrst0 obs=8k
dd if=/dev/nrst0 ibs=8k | funzip | tar xf (where, for example, nrst0 is a SCSI tape drive).
BUGS
zcat(1)
When piping an encrypted file into more and allowing funzip
to prompt for password, the terminal may sometimes be reset
to a non-echo mode. This is apparently due to a race condition between the two programs; funzip changes the terminal
mode to non-echo before more reads its state, and more then
``restores'' the terminal to this mode before exiting. To
recover, run funzip on the same file but redirect to
/dev/null rather than piping into more; after prompting
again for the password, funzip will reset the terminal properly.
There is presently no way to extract any member but the
first from a ZIP archive. This would be useful in the case
where a ZIP archive is included within another archive.
In
the case where the first member is a directory, funzip simply creates the directory and exits.
The functionality of funzip should
unzip itself (future release).
SEE ALSO
unzip(1), zip(1),
zipsplit(1)
zipcloak(1),
be
incorporated
zipinfo(1),
into
zipnote(1),
AUTHOR
Mark Adler (Info-ZIP)
Info-ZIP
Last change:
7 Feb 94
v3.8